JP2013147434A - Liquid cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid cosmetic not only suppresses stickiness and squeakiness caused by the high inclusion of a humectant but also has a rich body and fresh feeling of use.SOLUTION: A liquid cosmetic includes (a) 10-40 mass% of a humectant, (b) 0.01-3 mass% of an oil, (c) 0.01-5 mass% of a hydrophilic surfactant and (d) 0.001-0.3 mass% of a polyacrylic acid or its metal salt and has an average emulsion particle diameter of ≤500 nm. Preferably the blending quantity of a polyalkylene glycol contained in (a) the humectant is 0.1-3 mass% based on the whole amount of cosmetic.

Description

  The present invention relates to a liquid cosmetic having a high moisturizing effect and excellent usability. More specifically, the present invention relates to a liquid cosmetic that has a high moisturizing agent and has no stickiness and a smooth feel.

  In low-viscosity liquid cosmetics such as lotions, freshness and a refreshing feel are required only when applied to the skin.

  For example, Patent Document 1 describes that stickiness and creaking produced when a salicylic acid derivative, which is a whitening component, is blended into a microemulsion formulation blended with a small amount of oil. However, the moisturizing agent blended in the cosmetics of Patent Document 1 is at most 6% by mass, and if the amount of the moisturizing agent is increased to 10% by mass or more in order to enhance the moisturizing effect, the stickiness due thereto is sufficiently increased. It could not be alleviated and there was a case where the richness was lacking.

  On the other hand, in Patent Document 2, a sheet-like cosmetic compounded with a tea extract and / or caffeine and further impregnated with a sodium polyacrylate compound is not irritating to the skin, and the skin feels tight. It is described that it has a moist feeling and excellent sagging improvement effect. That is, it is taught that the irritation to the skin, which the conventional active ingredient having a skin tightening effect such as caffeine had, can be alleviated by sodium polyacrylate. However, no effect on the stickiness caused by the moisturizing agent has been studied.

JP 2010-116392 A JP 2011-32193 A

  Accordingly, an object of the present invention is to provide a liquid cosmetic material that does not cause stickiness even when a high amount of a moisturizing agent such as polyalkylene glycol is blended, and has a rich and fresh feeling.

  In order to solve the above-mentioned problems, the present inventors have conducted intensive research. As a result, polyacrylic acid is further added to a microemulsion formulation containing a high amount of moisturizer (10% by mass or more), resulting in the moisturizer. It has been found that the stickiness to be suppressed can be suppressed and a rich feeling can be imparted, and the present invention has been completed.

  That is, the present invention comprises (a) 10-40% by mass of a humectant, (b) 0.01-3% by mass of oil, (c) 0.01-5% by mass of hydrophilic surfactant, and (d ) A cosmetic comprising 0.001 to 0.3% by mass of polyacrylic acid or a metal salt thereof, and having an average emulsion particle size of 500 nm or less.

  The liquid cosmetic composition of the present invention has an excellent feeling of use because even if it contains a high amount of moisturizing agent, stickiness and creaking caused by it are suppressed, and there is a rich feeling and a fresh feel.

    The humectant (component a) blended in the liquid cosmetic of the present invention is not particularly limited as it is commonly used in cosmetics and the like. For example, saccharoids such as sucrose, sorbitol, glycerin, 1,3-butylene glycol, propylene glycol, dipropylene glycol, or polyols, a polyhydric alcohol mother nucleus having three or more hydroxyl groups in the molecule, and propylene oxide 2 Polyether compound obtained by addition polymerization of -100 mol and ethylene oxide 50 mol or less, ethyl gluces-10, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, bile acid monosalt Dl-pyrrolidone carboxylic acid mono-salt, short chain soluble collagen, Isaiyobara extract, Yarrow extract, propylene glycol, dipropylene glycol, 1,3-butylene glycol, 1,4-butylene Glycols such as recall, diethylene glycol, triethylene glycol, and higher molecular weight polyethylene glycol, glycerin, diglycerin, and higher molecular weight polyglycerins; sugar alcohols such as sorbitol, mannitol, maltitol, xylitol, erythritol, fructose , Glucose, galactose, maltose, lactose, trehalose and other sugars, polypropylene glycol / polyethylene glycol copolymer or dimethyl ether thereof.

  The blending amount of the humectant in the liquid cosmetic of the present invention is 10 to 40% by mass, preferably 15 to 40% by mass. By blending such a larger amount of humectant than usual, a cosmetic with a particularly excellent moisturizing effect can be obtained.

  In addition, when the moisturizer mix | blended with the liquid cosmetics of this invention contains polyalkylene glycol, it is preferable that the compounding quantity shall be 0.1-3 mass% with respect to the whole cosmetics. If the blending amount of the polyalkylene glycol exceeds 3% by mass, stickiness may occur on the contrary.

  Although it does not specifically limit as an oil component (component b) used with the liquid cosmetics of this invention, A liquid oil component is preferable. For example, camellia oil, macadamia nut oil, olive oil, castor oil, safflower oil, soybean oil, tea seed oil, cocoa butter, palm oil, hydrogenated palm oil, palm oil, owl, hydrogenated castor oil, beeswax, candelilla wax, carnauba wax, lanolin , Liquid lanolin, jojoba wax, hard lanolin, polyoxyethylene lanolin alcohol ether, polyoxyethylene cholesterol ether and other natural oils and fats, liquid paraffin, ozokerite, squalene, paraffin, ceresin, petrolatum, microcrystalline wax and other hydrocarbon oils Isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexylate, dipentaerythritol Synthetic oils such as fatty acid esters, pentaerythritol tetra-2-ethylhexylate, glycerin tri-2-ethylhexylate, trimethylolpropane triisostearate, cetyl-2-ethylhexanoate, castor oil fatty acid methyl ester, triethylhexanoin Component, Cyclic polysiloxane such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, cyclic polysiloxane such as decamethylpolysiloxane, dodecamethylpolysiloxane, tetramethyltetrahydrogenpolysiloxane, three-dimensional network structure And silicones such as silicone rubber and silicone rubber. Among these, one or more oils selected from hydrocarbon oils, polar oils, silicone oils, and higher fatty acids having 12 to 22 carbon atoms, particularly triethylhexanoin is preferable.

  The oil content blended in the cosmetic of the present invention is 0.01 to 3% by mass, preferably 0.05 to 2% by mass, and more preferably 0.1 to 1% by mass. If the blending amount is less than 0.01% by mass, the effect of improving the feeling of use such as creaking and stickiness is insufficient, and if the blending amount exceeds 3% by mass, the stability of the microemulsion may be deteriorated.

  The hydrophilic surfactant (component c) to be blended in the cosmetic of the present invention is not particularly limited. For example, polyoxyethylene (hereinafter referred to as POE) sorbitan monooleate, POE sorbitan monostearate, POE sorbitan POE sorbitan fatty acid esters such as trioleate, POE sorbite monooleate, POE sorbite fatty acid esters such as POE sorbite monooleate, POE glycerin monostearate, POE glycerin monoisostearate, POE glycerin POE glycerin fatty acid esters such as isostearate, POE monooleate, POE distearate, POE fatty acid esters such as POE dioleate, POE oleyl ether, POE stearyl POE alkyl ethers such as ether, POE behenyl ether, POE2-octyldodecyl ether, POE2-hexyldecyl ether, POE2-heptylundecyl ether, POE2-decyltetradecyl ether, POE2-decylpentadecyl ether, POE cholestanol ether, POE alkylphenyl ethers such as POE nonylphenyl ether, POE / POP block copolymers, POE / POP cetyl ether, POE / POP2-decyltetradecyl ether, POE / POP alkyl ethers such as POE / POP hydrogenated lanolin, POE POE castor oil such as castor oil or hardened castor oil derivative, POE beeswax / lanolin derivative such as POE sorbit beeswax, POE phytosterol ether POE polyether-modified silicone surfactants, and the like. Among these, a hydrophilicity selected from polyoxyalkylene addition type alkyl ether, polyoxyalkylene addition type alkyl ester, polyoxyalkylene addition type sorbitan, polyoxyalkylene addition type hardened castor oil, polyoxyalkylene addition type phytosterol which is HLB13 or more. Nonionic surfactants, or hydrophilic anionic surfactants selected from N-acyl glutamates and acylalkyl taurates are preferred. In particular, POE hydrogenated castor oil and POE phytosterol ether are preferable.

  Generally the hydrophilic surfactant mix | blended with the cosmetics of this invention is 0.01-5 mass%, Preferably it is 0.05-3 mass%, More preferably, it is 0.1-1 mass%. . If the blending amount is less than 0.01% by mass, the emulsion stability may deteriorate, and if it exceeds 5% by mass, the usability such as stickiness may be degraded.

The liquid cosmetic of the present invention further contains polyacrylic acid or a metal salt thereof (component d) as an essential component.
The polyacrylic acid used in the present invention can be selected from those conventionally used as a thickener in cosmetics and the like, and is not particularly limited, and commercially available products can also be used.

In the present invention, preferred examples of the metal salt of polyacrylic acid include alkali metal salts such as sodium and potassium.
The number average molecular weight of the polyacrylic acid is not particularly limited, but usually 10,000 to 250,000, preferably 10,000 to 100,000, more preferably about 10,000 to 50,000 is used. .

  The compounding quantity of the polyacrylic acid mix | blended with the liquid cosmetics of this invention is 0.001-0.3 mass%, Preferably it is 0.002-0.2, More preferably, it is 0.003-0.1. It is. If the blending amount is less than 0.001% by mass, the stickiness-inhibiting effect is not sufficient, and if it exceeds 0.3% by mass, the viscosity becomes high, and the familiar and fresh feel peculiar to liquid cosmetics is lost. May be.

  The liquid cosmetic of the present invention preferably further contains a lipophilic surfactant (component e) having an HLB of 7 or less. The lipophilic surfactant having an HLB of 7 or less to be blended in the cosmetic composition of the present invention is not particularly limited. For example, polyglyceryl diisostearate-2, polyoxyethylene fatty acid glyceryl, polyoxyethylene / methylpolysiloxane co-polymer Examples thereof include polymers, fatty acid sorbitans, fatty acid polyoxyethylene sorbitans, polyoxyethylene alkyl ethers, polyglycol fatty acid esters, alkaloyl diethanol amides, fatty acid isopropanol amides and the like, and polyglyceryl-2 diisostearate is particularly preferable.

  The blending amount of the lipophilic surfactant in the liquid cosmetic of the present invention is preferably 0.01 to 5% by mass, more preferably 0.1 to 3% by mass. If the blending amount is less than 0.01% by mass, the blending effect (emulsion stability improvement, etc.) cannot be obtained, and if it exceeds 5% by mass, the usability such as stickiness may be deteriorated.

The liquid cosmetic composition of the present invention forms a system (narrowly defined microemulsion) in which the mixed oily, aqueous and amphipathic components are dispersed in a transparent or translucent one-liquid phase in which thermodynamically stable swollen large micelles are dispersed. It is preferable. However, the microemulsion in the present invention includes a microemulsion in a broad sense including a thermodynamically unstable dispersion system and a transparent or translucent dispersion system stable over time.
The microemulsion constituting the cosmetic of the present invention has an average emulsion particle size of 10 to 500 nm, a viscosity of 2000 mPa · s or less (30 ° C.), and particularly preferably 300 mPa · s or less.

  In the liquid cosmetic composition of the present invention, for example, as a first step, the components (b) and (c) (optionally further (e) are mixed) and heated to 70 ° C. to prepare a one-phase microemulsion composition. Then, it can be manufactured by passing through a step of diluting into a water-containing phase (containing components (a) and (d)) as the second stage.

  The liquid cosmetic of the present invention may be blended with other additives as necessary, and the type and blending amount are appropriately selected within a range that does not impair the effects of the present invention. Examples of other additives include fragrances, pigments, buffers, salts, whitening agents, preservatives, antioxidant fragrances, colorants and other powders, drugs, thickeners, ultraviolet absorbers, and active aids. .

  The liquid cosmetic composition of the present invention is preferably provided as a transparent or translucent lotion, an essence (beauty serum) or the like. By adopting such a configuration, an excellent feeling of use can be achieved while utilizing an excellent moisturizing effect.

  Hereinafter, the present invention will be described in more detail with reference to specific examples, but these do not limit the technical scope of the present invention. In addition, the prescription amounts in the following examples, comparative examples, and prescription examples are all mass%.

Liquid cosmetics having the compositions listed in Tables 1 to 3 below were prepared.
Next, an actual use test was conducted using 20 liquid panels using these liquid cosmetics. The test items are non-stickiness, squeakiness, richness, and freshness. Each test panel evaluated each test item based on the following evaluation point criteria, and was ranked in four stages according to the total of the evaluation points. The ranked results are shown in Tables 1-3.

Evaluation point criteria (no stickiness, no squeaking, richness, freshness):
5 points: Excellent.
4 points: Excellent.
3 points: Normal.
2 points: Inferior.
1 point: Very inferior.
Evaluation rank:
◎: Total score is 80 or more ○: Total score is 60 or more and less than 80 △: Total score is 40 or more and less than 60 ×: Total score is less than 40

  According to the results shown in Table 1, stickiness is suppressed by blending 0.001 to 0.3% by weight of polyacrylic acid even in cosmetics containing 17.5% by weight of moisturizing agents in total. Thus, a rich feeling and a fresh feeling are obtained (Examples 1 to 3). On the other hand, the comparative example 1 which does not contain oil and the comparative example 2 which does not contain polyacrylic acid even if it contains oil, feels sticky, and the richness is inferior. In addition, Comparative Example 3 containing 0.3% by mass of polyacrylic acid was excellent in richness, but was sticky and lacked freshness.

  According to the results of Table 2, even if the oil content is changed between 0.01 and 1% by mass, stickiness and squeak are suppressed by blending 0.005% by mass of polyacrylic acid (Example 4 and 5) When no oil is blended, no effect is obtained (Comparative Example 4). Conversely, when the amount of oil is 5% by mass, the amount of surfactant required to emulsify the oil increases, resulting in stickiness. And freshness was lost (Comparative Example 5).

  The results of Table 3 show that the stickiness of cosmetics containing 15.5% by mass of a humectant in total is suppressed by the addition of polyacrylic acid (Examples 6 and 7, Comparative Example 6). ). In addition, when the amount of the polyalkylene glycol contained in the humectant exceeds 3% by mass, an excellent rich feeling can be obtained, but a slight stickiness may occur as compared with the case where the amount is 3% by mass or less (however, (No problem in practical use) (Examples 7 and 8).

(Prescription Example 1)
Lotion:
Compounding ingredients Prescription amount (% by mass)
(A)
POE hydrogenated castor oil (60) 0.2
Polyglyceryl-2 diisostearate-2 0.2
Triethylhexanoin 0.1
Methyl Gluces-10 0.5
Fragrance Appropriate amount Butylene glycol 6.0
(B)
Glycerin 8.0
Polyacrylic acid Na 0.005
Phenoxyethanol 0.3
Water Residual alkoxy salicylate 1.0
Polyethylene glycol 20000 1.0
Ethanol 5.0

Production method:
Mix A and dissolve at 70 ° C. This was added to the mixed solution of B with stirring and emulsified to obtain a skin lotion. Average particle size 200 nm.

(Prescription example 2)
Whitening serum for whitening:
Compounding ingredients Prescription amount (% by mass)
(A)
Polyoxyethylene methyl glucoside 1.0
Isostearic acid 0.2
Glyceryl tri-2-ethylhexanoate 0.3
Polyoxyethylene (30) phytosterol 0.09
Sorbitan sesquiisostearate 0.03
(B)
Glycerin 8.0
Citric acid appropriate amount Sodium citrate appropriate amount Potassium hydroxide appropriate amount Dipotassium glycyrrhizinate 0.1
Arginine hydrochloride 0.1
Ethanol 1.0
Dipropylene glycol 10.0
Polyethylene glycol 1000 alkoxyxalicylate 0.6
Ogon Extract 1.0
Yukinoshita extract 0.1
Nettle extract 0.1
Tranexamic acid 0.1
Edetate trisodium 1.0
2-Ethylhexyl paramethoxycinnamate 0.05
Dibutylhydroxytoluene 0.01
Polyacrylic acid Na 0.008
Polyethylene glycol 6000 1.0
Paraben Appropriate amount Deep seawater Appropriate amount Purified water Residual perfume Appropriate amount

Production method:
In the stirred and dissolved aqueous phase (B), the heated dissolved surfactant to the oil component layer (A) were added with stirring to obtain a cloudy essence. Average particle size 200 nm.

For example, in Patent Document 1, resulting stickiness and squeak when formulated with salicylic acid derivative is a whitening component, it was suppressed to be a microemulsion formulation containing a combination of small amounts of oil are described. However, moisturizers are blended in cosmetics of Patent Document 1 is also 10 mass% or so much, the amount of humectant is increased more than that in order to enhance the moisturizing effect, sufficiently alleviate the stickiness caused by it It was not possible to do this, and there was a case where the richness was lacking.

JP 2009-242326 A JP 2011-32193 A

The compounding quantity of the polyacrylic acid mix | blended with the liquid cosmetics of this invention is 0.001-0.3 mass%, Preferably it is 0.002-0.2 mass% , More preferably, it is 0.003-0. .1 % by mass . If the blending amount is less than 0.001% by mass, the stickiness-inhibiting effect is not sufficient, and if it exceeds 0.3% by mass, the viscosity becomes high, and the familiar and fresh feel peculiar to liquid cosmetics is lost. May be.

According to the results shown in Table 1, stickiness is suppressed by blending 0.001 to 0.3% by weight of polyacrylic acid even in cosmetics containing 17.5% by weight of moisturizing agents in total. Thus, a rich feeling and a fresh feeling are obtained (Examples 1 to 3). On the other hand, the comparative example 1 which does not contain oil and the comparative example 2 which does not contain polyacrylic acid even if it contains oil, feels sticky, and the richness is inferior. In addition, Comparative Example 3 blended with polyacrylic acid exceeding 0.3% by mass was excellent in richness but was sticky and lacked freshness.

The results in Table 3 show that the stickiness and creaking of cosmetics containing a total of 15.5% by mass of a moisturizing agent are suppressed by the addition of polyacrylic acid (Examples 6 and 7, Comparative Examples). 6). In addition, when the amount of the polyalkylene glycol contained in the humectant exceeds 3% by mass, an excellent rich feeling can be obtained, but a slight stickiness may occur as compared with the case where the amount is 3% by mass or less (however, (No problem in practical use) (Examples 8 and 9 ).

Claims (4)

(A) 10-40% by mass of a humectant,
(B) 0.01-3 mass% of oil content,
(C) 0.01-5% by mass of a hydrophilic surfactant, and (d) 0.001-0.3% by mass of polyacrylic acid or a metal salt thereof,
A liquid cosmetic comprising an average emulsified particle size of 500 nm or less. The liquid cosmetic according to claim 1, wherein the amount of the (a) humectant is 15 to 40% by mass. The liquid cosmetic according to claim 1 or 2, wherein the polyalkylene glycol contained in the humectant (a) is 0.1 to 3% by mass with respect to the entire cosmetic. (E) The liquid cosmetic according to any one of claims 1 to 3, further comprising a lipophilic surfactant having an HLB of 7 or less.